When the file is updated, users are not created in the Ranger UI as expected.

Cause

Configuration issue.

Resolution

This was due to a configuration issue:

a) ranger.usersync.filesource.file was set to the default value. This was changed to /grid/RangerUserSync.txt and then Ranger was restarted via Ambari.

b) The configuration "ranger.usersync.source.impl.class" had to be set to "org.apache.ranger.unixusersync.process.FileSourceUserGroupBuilder". Then Ranger was restarted via Ambari and users were then automatically created/synced up.